class_docstr: Base class for database framework wrappers.
  
  Attributes
  ----------
  host: str
     It can be either:
        1. Known hostname or IP address in which database server resides.
        2. URI: A database framework specific connection string.
  name: str
     Name of database containing experiments.
  port: int
     Port that database server listens to for requests.
  username: str
      Name of user with write/read permissions to database with name `name`.
  password: str
      Secret phrase of user, `username`.
docstr: Disconnect from database, if `Database` `is_connected`.
docstr_tok: ["Disconnect","from","database",",","if","`","Database","`","`","is_connected","`","."]
code: def close_connection(self):
      """Disconnect from database, if `Database` `is_connected`."""
  
imports: import logging
  from abc import abstractmethod, abstractproperty
  from orion.core.utils import Factory, GenericFactory
label_desc: Use image node_id 5 for calling the Database obj's underlying member method code with example usage: obj.close_connection() without return types